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United States Patent | 5,659,352 |
Lee | August 19, 1997 |
A novel cable television (CATV) signal tuning method, which is capable of reducing the time taken to tune CATV signals transmitted via a cable, comprises (a) determining, in response to a mode determination signal, one of harmonical related carriers (HRC), interval related carrier (IRC) and standard (STD) transmission modes as a definitive transmission mode for a plurality of channels, to thereby produce mode information of the definitive transmission mode; (b) storing the mode information; and (c) fine-tuning, in response to a channel selection signal, a CATV signal from a selected channel based on the definitive transmission mode represented by the stored mode information.
Inventors: | Lee; Mi-Hwa (Seoul, KR) |
Assignee: | Daewoo Electronics Co., Ltd. (Seoul, KR) |
Appl. No.: | 580903 |
Filed: | December 27, 1995 |
Dec 27, 1994[KR] | 94-37253 |
Current U.S. Class: | 725/151; 348/731 |
Intern'l Class: | H04N 007/16 |
Field of Search: | 348/10,11,12,13,6,7,731,732,733,734,735 455/6.2,6.3,6.1,5.1 |
4677685 | Jun., 1987 | Kurisu | 455/4. |
5087977 | Feb., 1992 | Suizu | 358/193. |
5245437 | Sep., 1993 | Na | 358/191. |
5329364 | Jul., 1994 | Lee | 348/11. |
5508762 | Apr., 1996 | Lee | 348/734. |
5594510 | Jan., 1997 | Sakakibara | 348/731. |
Foreign Patent Documents | |||
6205314 | Jul., 1994 | JP | . |